My sister and I wanted to set up a website where members or our family could share their life experiences. My grandparents are now dead but my sister interviewed them several years before they passed away, and we wanted to archive their stories as well as the thoughts and memories of our living relatives.
The WP Family Tree plugin organizes our relatives in a genealogical tree and lets them open up their own node to answer the interview questions we preloaded for them. Since each node links to a WordPress post our family members can add text, images, and even audio/video recordings to their profile pages.
This plugin does just what I need.